suggest 3 ways the body meets the additional demands for (O2) imposed by exercise??

Answer 1

(1) increased cardiac output and more supply of blood to appropriate tissues
- by increased heart rate
- redirection of blood away from skin and splanchnic circulations to brain, heart and muscle

(2) increased respiratory drive
- faster breathing despite hyperventilatory decrease in CO2

(3) increased respiratory recruitment
- deeper breaths using more diaphragm expansion opening up more sections of lung which are normally closed in quiet breathing

Answer 2

when you are running , at the time of underwater swimming and when you go to space